login

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).

A378020 as a simple table

na(n)
10
20
31
42
51
63
74
83
95
106
115
127
136
145
158
169
178
187
1910
209
2111
2212
2311
2413
2512
2611
2714
2813
2912
3015
3116
3215
3314
3417
3516
3618
3719
3818
3917
4020
4119
4221
4320
4419
4522
4621
4720
4814
4923
5022
5124
5225
5324
5426
5527
5626
5728
5827
5926
6023
6125
6224
6321
6429
6528
6630
6729
6828
6931
7032
7131
7230
7328
7429
7533
7634

[0,0,1,2,1,3,4,3,5,6,5,7,6,5,8,9,8,7,10,9,11,12,
 11,13,12,11,14,13,12,15,16,15,14,17,16,18,19,18,
 17,20,19,21,20,19,22,21,20,14,23,22,24,25,24,26,
 27,26,28,27,26,23,25,24,21,29,28,30,29,28,31,32,
 31,30,28,29,33,34]